Hose-coupling



(No Model.)

R. P. GEMLD.V

HDSE COUPLING.

N0. 37 1,'753. Patelnted Oct. 18, 1887.

' Fmgf Wmemam ROBERT F. GERALD, OF BOSTON, MASSACHUSETTS, ASSIGNOR OFTWO- I THIRDS TO SAMUEL O. NIGHTINGALE, OF SAME PLACE, AND FRANK C.OHILDS, OF XVINCHESTER, MASSAOHUSETTS. V

HosE-coUPLiNe.

SPECIFICATION forming part of Letters Patent No. 371,753, dated October18I 188'7.

Application filed August 3, 1 885. Serial No. 173,328. (No model.)

To allwhom it may concern.-

improved coupling-fastcnings. Fig. 2 is a view of the outer ring of thecoupling-fastening. Fig. 3 is a View of Fig. l from the upper end. r

A is the hose. B is the metallic coupling, provided with -thescrew-thread b to connect it to 'another piece of hose. The shank of thecoupling B is of tubular shape and extends downward into the tubularhose for some considerable distance. Around the outside of this and thehose is secured the sleeve or collar C, which is formed of a cylindricalportion, 0, and a rectangular portion,, 0', at its upper end. Therectangular portion is intended to enable it to be held by a wrench Linposition during the fastening of the hose and coupling together, ashereinafter described, and it has a slot, 02, eut entirely through it,to allow of the requisite compression being brought uponit to close itaround the hose A. The cylindrical portion 0 of the sleeve is made of aconical form on the outside, growing larger in diameter to- Ward thecollar part c',.and is cut away in a series of slots, 03, which arebroadest at their lower ends and become gradually narrower toward therectangular collar c'. The slot cAl in the latter coincides with one ofthe slots 03 in the tubular portion.

Upon the exterior of the tubular portion c of the sleeve is formed ascrew-thread, 04, before it is cut away by the slots ciwhich screwthreadis made rounding or approaching a circular form in its grooves, insteadof being of a V lshape in that part.

A nut, D, is made rectangular on its outer surface and cylindrical inform on its inner surface or bore--that is, its bore is not taperingto'conform with the taper of the tubular part 0 of sleeve O, and thebore of vthe nut is provided with a screw-thread fitting into andcorresponding in shape with the screw-thread 04 of the sleeve O. Thetaper of the tubular part of sleeve O is quite gradual, and the nut D isscrewed onto the tubular part of the sleeve until the requisitecompression is produced against the shank of the coupling within thehose to hold the latter in place on the coupling.

It is found that, the tubularportion 'of sleeve C being provided withnotehes @and a screwthread, 04, of the shape described, it is possibleto produce With the nut D, having` a cylindrical bore and acorrespondingly-shaped screwthread, a much greater compression With agiven amount of force expended upon the sleeve C than with the taperingnut and V- shaped thread, because the shape of the thread allows of aplay or adjustment of the screwthread of thesleeve to thatof the nut inscrewing the latter upon the sleeve while bringing the threads toregister With each other,which cannot be obtained by a V-shaped threadwithout cutting out and destroying it. The series of slots 03 in thetubular portion of the sleeve C assist in this adjustmerit of thethreads on the sleeve and within the nut to each other, while the slotc2 allows of the compression of the sleeve upon the hose as the nut D isscrewed home upon the sleeve.

WVhat I claim as new and of my invention 1s- The combination of thecoupling B, hose A, and slotted sleeve C, provided with a series ofslots, 03 03, in its tubular portion, and a screw-` thread therconhaving its groove approximating a circular shape in the bottom, and thenut D, provided with a cylindrical bore and a correspondingly-shapedinternal screw-thread, substantially as described.

ROBERT F. GnRALn.

VVitnesses:

N. P. OcKING'roN, DAVID HALL Rion.

